/*position fixed
-------------------------------------------------------------- */
body {background-attachment:fixed;}
.header_fixed{ width:100%;height:102px;background:#C7CACF url(../images/body_bg.png) repeat-x 0 90px;position:fixed; z-index:99999;bottom:auto;top:0px; left:0}
* html .header_fixed{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop));}
.nav{position:fixed;bottom:auto;top:102px;}
* html .nav{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop)+102);}
.main_fixed{ width:787px;position:fixed; z-index:99998;bottom:auto;top:102px;}
* html .main_fixed{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop)+102);}
.main{ margin-left:163px}
.main_c{ padding-top:180px}